Adding the stripe_event gem

- [Instructor] The one very last feature that we need…to build is we need to listen to Stripe's Webhook events…and record charges as they come across in our Rails app,…and that way we can take those charges and offer PDF…receipts to our customers every single time their credit…card is charged.…So, this is super easy, if you go to Stripe's dashboard,…and you look for the Events and Webhook section, each time…that any action is made in your Stripe account,…it will automatically create an event, and you will see…that there are some for charges, invoices, which handle…the payments for a subscriptions, and creation of…subscriptions themselves.…

So there's a whole list of these if you go to their API…documentation that will list out all the various types…of things you can listen to, and there's quite a lot…of different actions.…The one we're concerned with is the charge succeeded action,…and this is the one we're going to be listening to in our…Rails application.…To get a better idea of what we will see in our Rails…